Mule-spinning machine.



No. 758,652. PATBNTED MAY;-i3-; ,,1904. J. HOLT.

MULE SPINNING MACHINE.

nrmoumn FILED 1120.12. 1903.

N0 MODEL.

Watmam, I .v m h v u ,1072% lfolfj b UNITED STATES Patented May 3, 1904.

PATENT OFFICE.

JOHN HOLT, OF LAWRENCE, MASSACHUSETTS.

MULE-SPINNING MACHINE.

SPECIFICATION forming part of Letters Patent No. 758,652, dated May 3, 1904.

Application filed December 12, 1903. Serial No. 184,887- (No model.)

To aZl whom it may concern.-

Be it known that I, J OHN HOLT, a citizen of the United States, and a resident of Lawrence.

in the county of Essex, State of Massachusetts, have invented certain new and useful Improvements in Mule-Spinning Machines, of which the following is a full, clear, and exact description.

In spinning-machines of this character it is customary to have the twist-slide drop at certain intervals and then to be raised again to its former position. This dropping is effected by what is termed the twist-wheel, which is rotated by engagement with the twistworm on the main drive and by the impact of a pin carried by said wheel against the twistslide catch, such impact causing said catch to release the twist-slide and permit it to drop. The twist-wheel being carried by the twistslide is consequently caused to leave the twistworm on the main drive whenthe twist-slide drops and to be reengaged therewith when the slide returns to its normal position. The objection to this arrangement is that it is impossible to accurately adjust the catch so as to retain the twist-wheel with its worm-teeth in exact mesh with the twist-worm. During my many years experience with these machines I have found that either the twist-wheel and worm are held so tightly together as to cause unnecessary friction and wear, with consequent loss of power, or the teeth are but partially held in engagement and the points only thereof subject to wear. Of the two extremes the latter is the more objectionable for the reason that such piecemeal wear soon renders the twist-wheel worthless and necessitates the replacement of quite an expensive part of the machine.

The object of my invention is the construction of means for enabling the twist-slide to elastically support the twist-wheel in such a manner that when forced up to its normal position it will yieldingly hold the twist-wheel in engagement with the twist-worm and always maintain a proper mesh between the same notwithstanding any wear of the parts or inaccuracy of construction.

Referring to the drawings forming part of of this specification, Figure 1 is an elevation a portion of a mule, showing my improvement applied thereto. Fig. 2 is a detail sectional view, nearly full size, of the particular part embodying my invention; and Fig. 3 is a detail plan view of the latter with parts broken away and part in section.

V The twist-slide 1 is of the usual pattern, with the exception that its upper end is formed with means for carrying my improvement, to be hereinafter described. Its catch 20 for holding the slide in its normal position is of the customary construction, being designed to hold the slide until the twist-wheel has completed its rotation and caused the said slide to be released therefrom, as already stated. The upper end of said slide instead of being made solid is formed with two uprights 2, each grooved in the surfaces facing each other, as shown in Fig. 3 at 4c, and within these grooves or ways is slid ably held the block 12, carrying the stud 11, upon which is mounted the twistwheel 10, said stud,wheel, and pin 15,carried by the latter, all being of the usual construction.

Projecting from the under face of the block strength to suitably press the wheel into mesh with the twist-worm l0- when the slide is in its elevated position, but to wholly release the said wheel from the twistworm when the slide has dropped to its lowest position. Half an inch is ample resilient variation for the twist-wheel and slide. Thus constructed, when the slide 1 is forcibly raised until its catch is enabled to be engaged and hold it the twist-wheel 10 is carried up against the worm 4:0. The latter being on the main drive and in constant motion immediately meshes with the twist-wheel teeth and sets the same in motion. As is evident, the springs press the teeth of the wheel lOwholly into engagement With the worm and insure 3O simply yield slightly more and retain substantially the same contact as before. Moreover, it sometimes happens that when the slide is forced upward the points of the teeth of the wheel 10 meet squarely against the crest of the worm, and where the wheel is rigidly carried by the slide something is liable to break. \Vith the springs 30, however, there is absolutely no danger of injury, since the slide can rise and be secured in position with the worm and teeth still unmeshed. Then in a moment the rotation of the worm causes it to properly engage with the wheels teeth.

\Vhat I claim as my invention, and for which I desire Letters Patent, is as follows, to wit:

1. In a mule-spinning machine, the combination with the main drive and the worm thereon, of the twist-slide, the block slidably carried by said slide, resilient means yieldingly supporting said block, and the twist-wheel carried by said block, substantially as described.

2. In a mule-spinning machine, the combination with the main drive and the worm thereon, of the twist-slide having the grooved uprights, the block slidable between said uprights, the twist-wheel carried by said block, the pins projecting from the under face of said block, and the coiled springs on said pins pressing said block upward, substantially as described.

In testimony that I claim the foregoing invention I have hereunto set my hand this 21st day of November, 1903.

JOHN HOLT.

Witnesses:

Jon JACKSON, GEORGE G. CoRLnss. 

